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A Coherently Strained Monoclinic [111]PbTiO3 Film Exhibiting Zero Poisson's Ratio State
Tang, Yunlong; Zhu, Yinlian; Ma, Xiuliang; Hong, Zijian; Wang, Yujia; Wang, Wenyuan; Xu, Yaobin; Liu, Ying; Wu, Bo; Chen, Lang; Huang, Chuanwei; Chen, Longqing; Chen, Zuhuang; Wu, Haijun; Pennycook, Stephen J.
2019-08-01
Source PublicationADVANCED FUNCTIONAL MATERIALS
ISSN1616-301X
Volume29Issue:35
Abstract[111]-Oriented perovskite oxide films exhibit unique interfacial and symmetry breaking effects, which are promising for novel quantum materials as topological insulators and polar metals. However, due to strong polar mismatch and complex structural reconstructions on (111) surfaces/interfaces, it is still challenging to grow high quality [111] perovskite heterostructures, let alone explore the as-resultant physical properties. Here, the fabrication of ultrathin PbTiO3 films grown on a SrTiO3(111) substrate with atomically defined surfaces, by pulsed laser deposition, is reported. High-resolution scanning transmission electron microscopy and X-ray diffraction reveal that the as-grown [111]PbTiO3 films are coherent with the substrate and compressively strained along all in-plane directions. In contrast, the out-of-plane lattices are almost unchanged compared with that of bulk PbTiO3, resulting in a 4% contraction in unit cell volume and a nearly zero Poisson's ratio. Ferroelectric displacement mapping reveals a monoclinic distortion within the compressed [111]PbTiO3, with a polarization larger than 50 mu C cm(-2). The present findings, as further corroborated by phase field simulations and first principle calculations, differ significantly from the common [001]-oriented films. Fabricating oxide films through [111] epitaxy may facilitate the formation of new phase components and exploration of novel physical properties for future electronic nanodevices.
Keyword[111] perovskite film ferroelectric monoclinic Poisson's ratio strain engineering
Indexed BySCI
Language英语
WOS IDWOS:000484382300003
PublisherWILEY-V C H VERLAG GMBH
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80851
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Tang, Yunlong,Zhu, Yinlian,Ma, Xiuliang,et al. A Coherently Strained Monoclinic [111]PbTiO3 Film Exhibiting Zero Poisson's Ratio State[J]. ADVANCED FUNCTIONAL MATERIALS,2019,29(35).
APA Tang, Yunlong.,Zhu, Yinlian.,Ma, Xiuliang.,Hong, Zijian.,Wang, Yujia.,...&Pennycook, Stephen J..(2019).A Coherently Strained Monoclinic [111]PbTiO3 Film Exhibiting Zero Poisson's Ratio State.ADVANCED FUNCTIONAL MATERIALS,29(35).
MLA Tang, Yunlong,et al."A Coherently Strained Monoclinic [111]PbTiO3 Film Exhibiting Zero Poisson's Ratio State".ADVANCED FUNCTIONAL MATERIALS 29.35(2019).
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